Serena is Abby's friend. Serena looks after Abby's three$-$year$-$old dughter during the day so Abby can go to work. During $2023,$ Abby paid Serena $$4,000$ to care for her daughter. What is the amount of Abby's child and dependent care credit if her AGI for the year was $$30,000?($Exhibit $8-9)$

$$0$

$$810$

$$1,080$

$$4,000$